The invention relates to an implant, to a method for production thereof and to the use thereof for growing patients, comprising an alloy based on Mg-Zn-Ca. In order to satisfy the highest requirements with regard to compatibility and chemical and mechanical strength, the alloy according to the invention has 0.1 to 0.6 wt% zinc (Zn) and 0.2 to 0.6 wt% calcium (Ca) and, as the remainder, magnesium (Mg) and unavoidable contaminants caused by production with respectively a maximum of 0.01 wt% and overall a maximum of 0.1 wt%, wherein the ratio of the percentages by weight of Zn and Ca is less than or equal to 1.